1. Tardigrade
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  3. Biology
  4. The centromere or primary constriction of the chromosome contains rings of proteins that are intimately associated with a spindle fibre. These rings are called

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Q. The centromere or primary constriction of the chromosome contains rings of proteins that are intimately associated with a spindle fibre. These rings are called

BHUBHU 2010

Solution:

The centromere lies within a thinner segment of chromosome, the primary constriction. The regions of chromosome flanking the centromere contain highly repetitive DNA and may stain more intensely with the basic dyes (ie, constitutive heterochromatin). Centromeres are found to contain specific DNA sequences with special proteins bound to them, forming a disc-shaped structure, called Kinetochore.